/*******************************************************************************
 * Copyright 2014 United States Government as represented by the
 * Administrator of the National Aeronautics and Space Administration.
 * All Rights Reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package gov.nasa.ensemble.core.plan;

import gov.nasa.ensemble.common.type.IStringifier;
import gov.nasa.ensemble.common.type.StringifierRegistry;
import gov.nasa.ensemble.core.activityDictionary.ParameterDef;
import gov.nasa.ensemble.emf.util.EMFUtils;

import org.eclipse.emf.ecore.EAttribute;

public class ParameterStringifierUtils {
	
	@SuppressWarnings("unchecked")
	public static <T> IStringifier<T> getStringifier(EAttribute parameterDef) {
		if (parameterDef instanceof ParameterDef) {
			return getStringifier((ParameterDef)parameterDef);
		}
		return (IStringifier<T>) EMFUtils.getStringifier(parameterDef);
	}
	
	@SuppressWarnings("unchecked")
	public static <T> IStringifier<T> getStringifier(ParameterDef def) {
		if (hasChoices(def)) {
			return new ChoicesStringifier(def);
		}
		return StringifierRegistry.getStringifier(def.getType());
	}

	private static boolean hasChoices(ParameterDef def) {
		return 
			def != null
			&& def.getChoices() != null
			&& !def.getChoices().isEmpty();
	}

}
